/*
 * Copyright (c) 1998, 2008, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

package javax.swing.plaf.metal;

import sun.swing.SwingUtilities2;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.InternalFrameEvent;
import java.util.EventListener;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;
import javax.swing.plaf.basic.BasicInternalFrameTitlePane;


/**
 * Class that manages a JLF title bar
 *
 * @author Steve Wilson
 * @author Brian Beck
 * @since 1.3
 */

public class MetalInternalFrameTitlePane extends BasicInternalFrameTitlePane {

  protected boolean isPalette = false;
  protected Icon paletteCloseIcon;
  protected int paletteTitleHeight;

  private static final Border handyEmptyBorder = new EmptyBorder(0, 0, 0, 0);

  /**
   * Key used to lookup Color from UIManager. If this is null,
   * <code>getWindowTitleBackground</code> is used.
   */
  private String selectedBackgroundKey;
  /**
   * Key used to lookup Color from UIManager. If this is null,
   * <code>getWindowTitleForeground</code> is used.
   */
  private String selectedForegroundKey;
  /**
   * Key used to lookup shadow color from UIManager. If this is null,
   * <code>getPrimaryControlDarkShadow</code> is used.
   */
  private String selectedShadowKey;
  /**
   * Boolean indicating the state of the <code>JInternalFrame</code>s
   * closable property at <code>updateUI</code> time.
   */
  private boolean wasClosable;

  int buttonsWidth = 0;

  MetalBumps activeBumps
      = new MetalBumps(0, 0,
      MetalLookAndFeel.getPrimaryControlHighlight(),
      MetalLookAndFeel.getPrimaryControlDarkShadow(),
      (UIManager.get("InternalFrame.activeTitleGradient") != null) ? null :
          MetalLookAndFeel.getPrimaryControl());
  MetalBumps inactiveBumps
      = new MetalBumps(0, 0,
      MetalLookAndFeel.getControlHighlight(),
      MetalLookAndFeel.getControlDarkShadow(),
      (UIManager.get("InternalFrame.inactiveTitleGradient") != null) ? null :
          MetalLookAndFeel.getControl());
  MetalBumps paletteBumps;

  private Color activeBumpsHighlight = MetalLookAndFeel.
      getPrimaryControlHighlight();
  private Color activeBumpsShadow = MetalLookAndFeel.
      getPrimaryControlDarkShadow();

  public MetalInternalFrameTitlePane(JInternalFrame f) {
    super(f);
  }

  public void addNotify() {
    super.addNotify();
    // This is done here instead of in installDefaults as I was worried
    // that the BasicInternalFrameUI might not be fully initialized, and
    // that if this resets the closable state the BasicInternalFrameUI
    // Listeners that get notified might be in an odd/uninitialized state.
    updateOptionPaneState();
  }

  protected void installDefaults() {
    super.installDefaults();
    setFont(UIManager.getFont("InternalFrame.titleFont"));
    paletteTitleHeight
        = UIManager.getInt("InternalFrame.paletteTitleHeight");
    paletteCloseIcon = UIManager.getIcon("InternalFrame.paletteCloseIcon");
    wasClosable = frame.isClosable();
    selectedForegroundKey = selectedBackgroundKey = null;
    if (MetalLookAndFeel.usingOcean()) {
      setOpaque(true);
    }
  }

  protected void uninstallDefaults() {
    super.uninstallDefaults();
    if (wasClosable != frame.isClosable()) {
      frame.setClosable(wasClosable);
    }
  }

  protected void createButtons() {
    super.createButtons();

    Boolean paintActive = frame.isSelected() ? Boolean.TRUE : Boolean.FALSE;
    iconButton.putClientProperty("paintActive", paintActive);
    iconButton.setBorder(handyEmptyBorder);

    maxButton.putClientProperty("paintActive", paintActive);
    maxButton.setBorder(handyEmptyBorder);

    closeButton.putClientProperty("paintActive", paintActive);
    closeButton.setBorder(handyEmptyBorder);

    // The palette close icon isn't opaque while the regular close icon is.
    // This makes sure palette close buttons have the right background.
    closeButton.setBackground(MetalLookAndFeel.getPrimaryControlShadow());

    if (MetalLookAndFeel.usingOcean()) {
      iconButton.setContentAreaFilled(false);
      maxButton.setContentAreaFilled(false);
      closeButton.setContentAreaFilled(false);
    }
  }

  /**
   * Override the parent's method to do nothing. Metal frames do not
   * have system menus.
   */
  protected void assembleSystemMenu() {
  }

  /**
   * Override the parent's method to do nothing. Metal frames do not
   * have system menus.
   */
  protected void addSystemMenuItems(JMenu systemMenu) {
  }

  /**
   * Override the parent's method to do nothing. Metal frames do not
   * have system menus.
   */
  protected void showSystemMenu() {
  }

  /**
   * Override the parent's method avoid creating a menu bar. Metal frames
   * do not have system menus.
   */
  protected void addSubComponents() {
    add(iconButton);
    add(maxButton);
    add(closeButton);
  }

  protected PropertyChangeListener createPropertyChangeListener() {
    return new MetalPropertyChangeHandler();
  }

  protected LayoutManager createLayout() {
    return new MetalTitlePaneLayout();
  }

  class MetalPropertyChangeHandler
      extends BasicInternalFrameTitlePane.PropertyChangeHandler {

    public void propertyChange(PropertyChangeEvent evt) {
      String prop = evt.getPropertyName();
      if (prop.equals(JInternalFrame.IS_SELECTED_PROPERTY)) {
        Boolean b = (Boolean) evt.getNewValue();
        iconButton.putClientProperty("paintActive", b);
        closeButton.putClientProperty("paintActive", b);
        maxButton.putClientProperty("paintActive", b);
      } else if ("JInternalFrame.messageType".equals(prop)) {
        updateOptionPaneState();
        frame.repaint();
      }
      super.propertyChange(evt);
    }
  }

  class MetalTitlePaneLayout extends TitlePaneLayout {

    public void addLayoutComponent(String name, Component c) {
    }

    public void removeLayoutComponent(Component c) {
    }

    public Dimension preferredLayoutSize(Container c) {
      return minimumLayoutSize(c);
    }

    public Dimension minimumLayoutSize(Container c) {
      // Compute width.
      int width = 30;
      if (frame.isClosable()) {
        width += 21;
      }
      if (frame.isMaximizable()) {
        width += 16 + (frame.isClosable() ? 10 : 4);
      }
      if (frame.isIconifiable()) {
        width += 16 + (frame.isMaximizable() ? 2 :
            (frame.isClosable() ? 10 : 4));
      }
      FontMetrics fm = frame.getFontMetrics(getFont());
      String frameTitle = frame.getTitle();
      int title_w = frameTitle != null ? SwingUtilities2.stringWidth(
          frame, fm, frameTitle) : 0;
      int title_length = frameTitle != null ? frameTitle.length() : 0;

      if (title_length > 2) {
        int subtitle_w = SwingUtilities2.stringWidth(frame, fm,
            frame.getTitle().substring(0, 2) + "...");
        width += (title_w < subtitle_w) ? title_w : subtitle_w;
      } else {
        width += title_w;
      }

      // Compute height.
      int height;
      if (isPalette) {
        height = paletteTitleHeight;
      } else {
        int fontHeight = fm.getHeight();
        fontHeight += 7;
        Icon icon = frame.getFrameIcon();
        int iconHeight = 0;
        if (icon != null) {
          // SystemMenuBar forces the icon to be 16x16 or less.
          iconHeight = Math.min(icon.getIconHeight(), 16);
        }
        iconHeight += 5;
        height = Math.max(fontHeight, iconHeight);
      }

      return new Dimension(width, height);
    }

    public void layoutContainer(Container c) {
      boolean leftToRight = MetalUtils.isLeftToRight(frame);

      int w = getWidth();
      int x = leftToRight ? w : 0;
      int y = 2;
      int spacing;

      // assumes all buttons have the same dimensions
      // these dimensions include the borders
      int buttonHeight = closeButton.getIcon().getIconHeight();
      int buttonWidth = closeButton.getIcon().getIconWidth();

      if (frame.isClosable()) {
        if (isPalette) {
          spacing = 3;
          x += leftToRight ? -spacing - (buttonWidth + 2) : spacing;
          closeButton.setBounds(x, y, buttonWidth + 2, getHeight() - 4);
          if (!leftToRight) {
            x += (buttonWidth + 2);
          }
        } else {
          spacing = 4;
          x += leftToRight ? -spacing - buttonWidth : spacing;
          closeButton.setBounds(x, y, buttonWidth, buttonHeight);
          if (!leftToRight) {
            x += buttonWidth;
          }
        }
      }

      if (frame.isMaximizable() && !isPalette) {
        spacing = frame.isClosable() ? 10 : 4;
        x += leftToRight ? -spacing - buttonWidth : spacing;
        maxButton.setBounds(x, y, buttonWidth, buttonHeight);
        if (!leftToRight) {
          x += buttonWidth;
        }
      }

      if (frame.isIconifiable() && !isPalette) {
        spacing = frame.isMaximizable() ? 2
            : (frame.isClosable() ? 10 : 4);
        x += leftToRight ? -spacing - buttonWidth : spacing;
        iconButton.setBounds(x, y, buttonWidth, buttonHeight);
        if (!leftToRight) {
          x += buttonWidth;
        }
      }

      buttonsWidth = leftToRight ? w - x : x;
    }
  }

  public void paintPalette(Graphics g) {
    boolean leftToRight = MetalUtils.isLeftToRight(frame);

    int width = getWidth();
    int height = getHeight();

    if (paletteBumps == null) {
      paletteBumps
          = new MetalBumps(0, 0,
          MetalLookAndFeel.getPrimaryControlHighlight(),
          MetalLookAndFeel.getPrimaryControlInfo(),
          MetalLookAndFeel.getPrimaryControlShadow());
    }

    Color background = MetalLookAndFeel.getPrimaryControlShadow();
    Color darkShadow = MetalLookAndFeel.getPrimaryControlDarkShadow();

    g.setColor(background);
    g.fillRect(0, 0, width, height);

    g.setColor(darkShadow);
    g.drawLine(0, height - 1, width, height - 1);

    int xOffset = leftToRight ? 4 : buttonsWidth + 4;
    int bumpLength = width - buttonsWidth - 2 * 4;
    int bumpHeight = getHeight() - 4;
    paletteBumps.setBumpArea(bumpLength, bumpHeight);
    paletteBumps.paintIcon(this, g, xOffset, 2);
  }

  public void paintComponent(Graphics g) {
    if (isPalette) {
      paintPalette(g);
      return;
    }

    boolean leftToRight = MetalUtils.isLeftToRight(frame);
    boolean isSelected = frame.isSelected();

    int width = getWidth();
    int height = getHeight();

    Color background = null;
    Color foreground = null;
    Color shadow = null;

    MetalBumps bumps;
    String gradientKey;

    if (isSelected) {
      if (!MetalLookAndFeel.usingOcean()) {
        closeButton.setContentAreaFilled(true);
        maxButton.setContentAreaFilled(true);
        iconButton.setContentAreaFilled(true);
      }
      if (selectedBackgroundKey != null) {
        background = UIManager.getColor(selectedBackgroundKey);
      }
      if (background == null) {
        background = MetalLookAndFeel.getWindowTitleBackground();
      }
      if (selectedForegroundKey != null) {
        foreground = UIManager.getColor(selectedForegroundKey);
      }
      if (selectedShadowKey != null) {
        shadow = UIManager.getColor(selectedShadowKey);
      }
      if (shadow == null) {
        shadow = MetalLookAndFeel.getPrimaryControlDarkShadow();
      }
      if (foreground == null) {
        foreground = MetalLookAndFeel.getWindowTitleForeground();
      }
      activeBumps.setBumpColors(activeBumpsHighlight, activeBumpsShadow,
          UIManager.get("InternalFrame.activeTitleGradient") !=
              null ? null : background);
      bumps = activeBumps;
      gradientKey = "InternalFrame.activeTitleGradient";
    } else {
      if (!MetalLookAndFeel.usingOcean()) {
        closeButton.setContentAreaFilled(false);
        maxButton.setContentAreaFilled(false);
        iconButton.setContentAreaFilled(false);
      }
      background = MetalLookAndFeel.getWindowTitleInactiveBackground();
      foreground = MetalLookAndFeel.getWindowTitleInactiveForeground();
      shadow = MetalLookAndFeel.getControlDarkShadow();
      bumps = inactiveBumps;
      gradientKey = "InternalFrame.inactiveTitleGradient";
    }

    if (!MetalUtils.drawGradient(this, g, gradientKey, 0, 0, width,
        height, true)) {
      g.setColor(background);
      g.fillRect(0, 0, width, height);
    }

    g.setColor(shadow);
    g.drawLine(0, height - 1, width, height - 1);
    g.drawLine(0, 0, 0, 0);
    g.drawLine(width - 1, 0, width - 1, 0);

    int titleLength;
    int xOffset = leftToRight ? 5 : width - 5;
    String frameTitle = frame.getTitle();

    Icon icon = frame.getFrameIcon();
    if (icon != null) {
      if (!leftToRight) {
        xOffset -= icon.getIconWidth();
      }
      int iconY = ((height / 2) - (icon.getIconHeight() / 2));
      icon.paintIcon(frame, g, xOffset, iconY);
      xOffset += leftToRight ? icon.getIconWidth() + 5 : -5;
    }

    if (frameTitle != null) {
      Font f = getFont();
      g.setFont(f);
      FontMetrics fm = SwingUtilities2.getFontMetrics(frame, g, f);
      int fHeight = fm.getHeight();

      g.setColor(foreground);

      int yOffset = ((height - fm.getHeight()) / 2) + fm.getAscent();

      Rectangle rect = new Rectangle(0, 0, 0, 0);
      if (frame.isIconifiable()) {
        rect = iconButton.getBounds();
      } else if (frame.isMaximizable()) {
        rect = maxButton.getBounds();
      } else if (frame.isClosable()) {
        rect = closeButton.getBounds();
      }
      int titleW;

      if (leftToRight) {
        if (rect.x == 0) {
          rect.x = frame.getWidth() - frame.getInsets().right - 2;
        }
        titleW = rect.x - xOffset - 4;
        frameTitle = getTitle(frameTitle, fm, titleW);
      } else {
        titleW = xOffset - rect.x - rect.width - 4;
        frameTitle = getTitle(frameTitle, fm, titleW);
        xOffset -= SwingUtilities2.stringWidth(frame, fm, frameTitle);
      }

      titleLength = SwingUtilities2.stringWidth(frame, fm, frameTitle);
      SwingUtilities2.drawString(frame, g, frameTitle, xOffset, yOffset);
      xOffset += leftToRight ? titleLength + 5 : -5;
    }

    int bumpXOffset;
    int bumpLength;
    if (leftToRight) {
      bumpLength = width - buttonsWidth - xOffset - 5;
      bumpXOffset = xOffset;
    } else {
      bumpLength = xOffset - buttonsWidth - 5;
      bumpXOffset = buttonsWidth + 5;
    }
    int bumpYOffset = 3;
    int bumpHeight = getHeight() - (2 * bumpYOffset);
    bumps.setBumpArea(bumpLength, bumpHeight);
    bumps.paintIcon(this, g, bumpXOffset, bumpYOffset);
  }

  public void setPalette(boolean b) {
    isPalette = b;

    if (isPalette) {
      closeButton.setIcon(paletteCloseIcon);
      if (frame.isMaximizable()) {
        remove(maxButton);
      }
      if (frame.isIconifiable()) {
        remove(iconButton);
      }
    } else {
      closeButton.setIcon(closeIcon);
      if (frame.isMaximizable()) {
        add(maxButton);
      }
      if (frame.isIconifiable()) {
        add(iconButton);
      }
    }
    revalidate();
    repaint();
  }

  /**
   * Updates any state dependant upon the JInternalFrame being shown in
   * a <code>JOptionPane</code>.
   */
  private void updateOptionPaneState() {
    int type = -2;
    boolean closable = wasClosable;
    Object obj = frame.getClientProperty("JInternalFrame.messageType");

    if (obj == null) {
      // Don't change the closable state unless in an JOptionPane.
      return;
    }
    if (obj instanceof Integer) {
      type = ((Integer) obj).intValue();
    }
    switch (type) {
      case JOptionPane.ERROR_MESSAGE:
        selectedBackgroundKey =
            "OptionPane.errorDialog.titlePane.background";
        selectedForegroundKey =
            "OptionPane.errorDialog.titlePane.foreground";
        selectedShadowKey = "OptionPane.errorDialog.titlePane.shadow";
        closable = false;
        break;
      case JOptionPane.QUESTION_MESSAGE:
        selectedBackgroundKey =
            "OptionPane.questionDialog.titlePane.background";
        selectedForegroundKey =
            "OptionPane.questionDialog.titlePane.foreground";
        selectedShadowKey =
            "OptionPane.questionDialog.titlePane.shadow";
        closable = false;
        break;
      case JOptionPane.WARNING_MESSAGE:
        selectedBackgroundKey =
            "OptionPane.warningDialog.titlePane.background";
        selectedForegroundKey =
            "OptionPane.warningDialog.titlePane.foreground";
        selectedShadowKey = "OptionPane.warningDialog.titlePane.shadow";
        closable = false;
        break;
      case JOptionPane.INFORMATION_MESSAGE:
      case JOptionPane.PLAIN_MESSAGE:
        selectedBackgroundKey = selectedForegroundKey = selectedShadowKey =
            null;
        closable = false;
        break;
      default:
        selectedBackgroundKey = selectedForegroundKey = selectedShadowKey =
            null;
        break;
    }
    if (closable != frame.isClosable()) {
      frame.setClosable(closable);
    }
  }
}
